H3C S9500交换机ISIS路由故障问题处理方法

H3C S9500交换机ISIS路由故障问题处理方法

 

一、故障处理流程

 

图1 ISIS故障处理流程

二、故障处理步骤

1）步骤1

查看两端设备ISIS的配置是否正确，包括区域号、ISIS的level等信息。如果配置没有问题，请转步骤2。

<H3C>display current-configuration configuration isis

#

isis

 network-entity 86.0001.0571.0001.0001.00

 import-route direct

#

return

2）步骤2

检查接口配置，确认在接口上是否使能ISIS。如果接口已经使能ISIS，请转步骤3。

<H3C>display current-configuration interface Vlan-interface 3000

#

interface Vlan-interface3000

 ip address 3.3.3.1 255.255.255.0

 isis enable

#

return

3）步骤3

使用ping检测和对端接口是否能够ping通，如果无法ping通，检查两台设备互连端口VPID、VLAN配置信息，检查互连端口dot1x配置，检查互连端口STP状态。确认互连端口没有问题，请转步骤4。

4）步骤4

打开debugging isis adjacency调试开关，查看hello报文收发是否正常。如果hello报文收发正常，请转步骤5。如果hello报文收发不正常，通过端口镜像抓包确认报文hello报文是否进入交换机端口。如果确定hello报文进入交换机端口，请转步骤6。

*0.2102653092 H3C RM/7/RTDBG:ISIS-ADJ: Sending Lan L2 Hello on Vlan-interface2                                                                                                                                          

*0.2102654513 H3C RM/7/RTDBG:ISIS-ADJ: Rxed Lan L2 Hello on Vlan-interface2,from SNPA 00e0.fcf1.00f4                                                                                                                           

*0.2102654638 H3C RM/7/RTDBG:ISIS-ADJ: Rxed Lan L1 Hello on Vlan-interface2,from SNPA 00e0.fcf1.00f4                                                                                                     

*0.2102654769 H3C RM/7/RTDBG:ISIS-ADJ: Area Mismatch.Lan L1 Hello from  aaaa.aaaa.aaaa,on Vlan-interface2                                                                                                                  

*0.2102654910 H3C RM/7/RTDBG:ISIS-ADJ: Hello PDU Dropped                                                                                      

*0.2102656033 H3C RM/7/RTDBG:ISIS-ADJ: Sending Lan L1 Hello on Vlan-interface2                                                                                                                                                     

*0.2102657473 H3C RM/7/RTDBG:ISIS-ADJ: Rxed Lan L1 Hello on Vlan-interface2,from SNPA 00e0.fcf1.00f4                                                                                                                              

*0.2102657597 H3C RM/7/RTDBG:ISIS-ADJ: Area Mismatch.Lan L1 Hello from  aaaa.aaaa.aaaa,on Vlan-interface2                                                                                                                      

*0.2102657738 H3C RM/7/RTDBG:ISIS-ADJ: Hello PDU Dropped                                                                                           

*0.2102657819 H3C RM/7/RTDBG:ISIS-ADJ: Rxed Lan L2 Hello on Vlan-interface2,from SNPA 00e0.fcf1.00f4                                                                                                                               

*0.2102657951 H3C RM/7/RTDBG:ISIS-ADJ: Rxed Lan L2 Hello on Vlan-interface2,from SNPA 00e0.fcf1.00f4                                                       

5）步骤5

使用display isis routing查看ISIS的路由表，看ISIS路由是否计算正确。如果ISIS路由计算错误，请转步骤6。

<H3C>display isis route

                  ISIS Level - 1 Forwarding Table :

          Type - D -Direct, C -Connected, I -ISIS, S -Static, O -OSPF,  B -BGP, R -RIP

 

     Flags: R-Added to RM, L-Advertised in LSPs, U-Up/Down Bit Set

 

  Destination/Mask  In.Met     Ex.Met NextHop         Interface          Flags

-------------------------------------------------------------------------------

D 3.3.3.0/24         10               Direct          Vlan-interface3000 R/L/-

 

                  ISIS Level - 2 Forwarding Table :

 

          Type - D -Direct, C -Connected, I -ISIS, S -Static, O -OSPF,B -BGP, R -RIP

 

     Flags: R-Added to RM, L-Advertised in LSPs, U-Up/Down Bit Set

 

  Destination/Mask  In.Met     Ex.Met NextHop         Interface          Flags

-------------------------------------------------------------------------------

D 3.3.3.0/24         10               Direct          Vlan-interface3000 R/L/-

I 172.2.1.0/24       10               3.3.3.2         Vlan-interface3000 R/-/-

I 31.31.31.0/24      10               3.3.3.2         Vlan-interface3000 R/-/-

C 10.10.10.0/24      0                10.10.10.1      Vlan-interface10   R/L/-

6）步骤6

上述步骤无法定位问题，请参照1.1.2节中步骤三的介绍收集接口板CPU收包信息，并联系800进一步处理。